황토 급여가 거세한우의 발육에 미치는 영향

조원모,기광석,정하연,강수원,김준식,백봉현,김용국 한국국제농업개발학회 2003 韓國國際農業開發學會誌 Vol.15 No.1

본 연구는 거세한우 육성우에 대한 황토 첨가급여가 발육에 미치는 효과를 구명하고자 발육능력, 사료섭취량을 규명한 바 아래와 같은 결과를 얻었다. 전 시험기간 동안의 평균 일당증체량은 대조구와 황토급여구가 각각 0.91㎏과 0.87㎏/day로 대조구가 높은 것으로 나타났지만 유의성은 인정되지 않았다. 사료섭취량은 대조구와 황토급여구 모두 평균 일일 두당 농후사료 섭취량이 2.42㎏이었으나, 건초섭취량에 있어서는 각각 3.02와 3.14㎏으로 황토급여구가 다소 높은 경향으로 나타났다. The study was conducted to investigate the effect of dietary supplements of reddish clay on the growth performance in growing Hanwoo steers. A total of 8 calves was allocated into 2 feeding groups, control(basal diet) and treatment(basal diet plus ad libitim Reddish clay) for Hanwoo steers. This study was carried out for 5 months with a total of 8 calves. The results obtained in the present studies are summarized as follows : Average daily gains throughout the experimental period of 4 months to 9 months of age were 0.91 and 0.87㎏ for control group and reddish clay-supplemented group, respectively, however, no statistical significances were found. Average daily intake of concentrates was 2.42㎏ for each group, while that of hay tended to be higher in reddish clay-supplemented group(3.14㎏) than in control group(3.02㎏).

진화 알고리즘을 이용한 충격강성설계에 관한 연구

조석수,주원식,이선봉 東亞大學校 大學院 1997 大學院論文集 Vol.22 No.-

Impact loads may be expected in many of the engineering applications of composites. The suitability of composites for such applications is determined not only by the usual parameters, but its impact or energy-absorbing properties. Genetic algorithms(GA) is probabilistic optimization technique by principle of natural genetics and natural selection and neural networks(NN) is useful for predication operation on the basis of learned data. Therefore, This study presents optimization techniques on the basis of genetic algorithms and neural networks to minimum stiffness and weight design of laminated composites.

삭제된 법랑질의 표면거칠기에 따른 도재 라미네이트의 전단결합강도에 관한 연구

조영곤,박봉석 大韓齒科保存學會 1994 Restorative Dentistry & Endodontics Vol.19 No.1

유전자 알고리즘을 이용한 강성 및 중량 최적 설계에 관한 연구

조석수,주원식,이선봉 東亞大學校 大學院 1997 大學院論文集 Vol.22 No.-

Laminated composites are in the form of laminates consisting of multiple laminae oriented in the design directions and bonded together in a structural unit. The virtually limitless combinations of ply orientations, ply thickness and ply stacking sequences offered by laminated constructions considerably enhance the design flexibility inherent in composite structures. And it is known that genetic algorithms has an excellent ability in the area of combinatorial optimization problem. Therefore, the present paper deals with the stiffness and weight optimization of laminated composites under multiaxial loading on the basis of genetic algorithms.

교양 교육과정의 문제점과 개선 방안 : 조선대학교 건학이념 및 교육목적 달성을 위한 교양 교육과정

이달석,조주환,노봉오,김정주 조선대학교 사범대학 부설 교과교육연구소 1998 敎科敎育硏究 Vol.1 No.1

육상 창던지기 경기 중 최고기록 발현시기에 대한 연구

오봉석,조영제 한국스포츠리서치 2003 한국 스포츠 리서치 Vol.20 No.1

The purpose of this study was to find the best times that means the best record exhibition times during the javelin throwing competition of track and field. And anther purpose was to offer some valuable and practical informations about javelin throw to javelin throwers and their directors. The subjects of this study were 69(man 34, woman 35) javelin throwing athletes who passed elimination at national track and field events. These subjects thrown javelin 6 times, that is, 3 times during elimination times and 3 times during final times. So total throwing numbers were 552 times. And these javelin throwing records were recognized by Korea Amateur Athletic Federation as official records. The results were as follows; First, in man's javelin athletes the order of elimination record was first times> second times> third times. The order of final record was third times> first times> second times. And on the whole, the order of record was sixth times> fourth times, first times, fifth times> second times> third times. So man's javelin throw records were divided into three types and it's difference was significant(p<.05). Second, in woman's javelin athletes the order of elimination record was third times> second times> first times. The order of final record was third times, second times> first times. And on the whole, the order of record was sixth times, fifth times> third times> fourth time s> second times> first times. So woman's javelin records were divided into five types, but it's difference was not significant(p>.05). Third, the all time's relation of javelin throwing records was significant(p<.01). These results lend support for the notion that javelin throwing athletes have higher final records than elimination records. By the way, I think this kind of competition record distribution has some problems in the point of the javelin throwing trait. That is, the only one time's record that means the best competition record was accepted by KAAF as an official record. So, I think it is necessary for javelin athletes to improve their elimination record. In other words, during the elimination period javelin athletes are likely to be placed in situation that improve their competition record. This necessity was supported by the warming-up theory and by the trait of javelin throwing competition.

水産專門大學 漁業科 敎育課程 開發硏究

裵錫悌,宋之浩,李吉來,鄭興基,洪聖根,趙鳳坤,朴種洙 군산대학교 1983 群山水産專門大學 硏究報告 Vol.17 No.1

In order to develop the curriculum of the fishery department in the fisheries Jr. college, We have collected and analyzed the domistic and foreign data adquated to the fishey department under the international trend, also we gathered the opinion from the inquiring paper investigation and consultation to the industrial field, concerned college and graduate during the 6 month from September 1982. The fishery department curriculum in fisheries Jr. college will be industrialized with the concerned technics and knowledge in relation to speciality of maritime affairs. Accordingly, we have developed the adquate curriculum which is practical and can be cultivated the technician to adopt in the industrial society.

장거리달리기 생활체육 동호인의 10㎞ 달리기 구간기록과 체중의 관계에 대한 사례연구

오봉석,조영제 한국스포츠리서치 2003 한국 스포츠 리서치 Vol.14 No.6

This case study was carried out to elucidate whether body weight was affected by long distance run and to explore the relation body weight with the 10㎞ section records and to provide the prevention method of overweight and obesity and the elevation method of 10㎞ record to a lot of people interested in long distance run. The subject was thirty-nine years old male who has been taking part in 10㎞ run (1time/week) regularly for 6 months. And the section records of 10㎞ run were measured on 4㎞, 7㎞, 10㎞. The results were as followed: First, the body weight was significantly decreased after 10㎞ run, and the mean reduction extent was 1.02㎏. After six-month 10㎞ run(1time/week) the body weight was decreased about 3.39㎏(p<.001). Second, the relation of body weight with 10㎞ section records was significant(p<.01). Third, after six-month 10㎞ run(1time/week) the section records of 10㎞ were significantly shortened 1 minute 40 seconds in 4km, 2 minutes 10 seconds in 7㎞, 4 minutes 20 seconds in 10㎞(p<.001). Fourth, after 3 months of 10㎞ run(1time/week) the section record change modes of 10㎞ were continual. In summery, body weight was significantly reduced by 10㎞ run and has significant effect on the section records of 10㎞ run. And the accommodation period to 10㎞ run was about 3 months, so a person who interested in long distance run should put the first 3 months of long distance run to practical usage as an accommodation period and during this period he must more concentrate on running long distance than on shortening record.

CFRP 판재의 섬유방향에 따른 절삭성 평가

신봉철,하석재,강민형,권오양,조명우 한국공작기계학회 2008 한국공작기계학회 추계학술대회논문집 Vol.2008 No.-

In recent, the CFRP(Carbon Fiber Reinforced Plastics) composite has been widely used because it has light-weight and high mechanical strength. Therefore, CFRP composite is applied to variable industrial areas such as aerospace, automobiles, sporting goods, ships and so on. Generally, CFRP composite has been used in the industrial field by mechanical cutting processes. In this research, the CFRP composite specimen are laminated by 64plies with orientation angles such as 0°, 45°, 90° and [0°/±45°/90°]4S. The results are analyzed with cutting force and cutting surface.

상용 소프트웨어 GENESIS를 이용한 강도 설계 민감도해석에 관한 연구

이선봉,장득열,조석수 三陟大學校 2001 論文集 Vol.34 No.1

Mechanical component under fatique loading has striation with constant width, and SEM can estimate fracture type and loading condition. SEM has benefit to fatigue fracture analysis but striation can be observed according to the kind of material and range of crack growth rate, and can't. In this case, it needs AFM that can measure 3-dimensional surface profile with resolution of atomic size. In this study, to find fracture reason of torsion-mounted blade in nuclear plant, we estimate the relation between stress intensity factor range and surface roughness in 12% Cr steel by AFM and predict in-service load condition. Finite element analysis is performed on torsion-mounted blade